Adjustable caster.



J. M. WOOD.

ADJUSTABLE OASTER.

APPLIUATION FILED JULY 15, 1909 www@ 285 1969.

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UNITED sTATEs EATENT oEEioE.

JOHN M. Woon, E xENToN. oHIo.

ADJUSTABLE cAsTEE.

Specification of Letters lPatentl Patented Sept. 28, 1909.

Application filed July 15, 1909. Serial No. 507,858.

To all whom 'it may concern? Be it known that I, JOHN MfWooD, citizen of the United States, residing at Kenton,

coiiuty of Hardin,'State of Ohio, have incvented certain new and useful Improvements inAdjustable Casters, of wliiclrthe follow-` ing'is a specification, reference beingdiad therein to the accompanying drawing.

This invention-relates to adjustable c'as- 1 0 ters-and particularly to a construction Where the caster is movable toward and from the base of .an Varticle of furniture to be supported thereby.

The invention has for air object to provide a novel and improved construction comprisving a frame having levers pivoted therein provided with casters and independent cams beneath the opposite ends of said levers, and thev shafts of said cams having meshing '50 gears secured-thereto to elfect a simultane- Jops movement of the levers. "s Other 'and further objects and .advantages of the invention will be hereinafter set forth and the novel features, thereof defined hy the `appended claims;

In the drawing2--Figuie 1 shows an elevation of a show case having the invention applied'thereto; Fig. 2 isfahorizontal sec-A tion on line 2 2, Flg. 1; Fig. 3 is a vertical 'section on line f, Fig. 2'; Fig. 4 is a simi- 7 lar-section on lined-4, Fig. 2; and Fig. 5 is l a sectional view illustrating a inodiied form of the invention. Like` numerals of reference refer to like parts in the several figures of the drawing The numeral 10 designates a frame which may comprise the base of a showcase or any other article of furniture to which theinvei'- fifi-.tion is to beappliedf Within this frame a i0 supporting'bai" 11 is provided adapted to re-\ ceivepivots 12 extending4 fromhthe. frame therethrough. Upon these pivots, levers 13 are mounted, each being provided at one end with therol'ler or caster 14 adapted to supi@ port the article above the floor or surface ,iipon which it would otherwise rest. The

inner ends of these levers 13 are disposed toward each other and beneath them lifting cains 16 are located, each cam being inde,

pendent of the other and mounted upon a separate shaft 17. The shafts 17 extend 1parallel to each other and are provided with segmental gears 18 secured thereto and meshing with each other to effect a simultaneous operation of' the-levers. These gears are each formed with a portion 1) which limits i ered positions.

the travel thereof in either direction and retains the levers iii 'either their raised or'low- One of the shafts 17 is extended through the base and provided with a portion 20 adapted to receive an operating handle 21 as shown by dotted 4lines in Fig. 1. The levers 13 may be duplicated at opposite ends of shafts 17 as" shown in Fig. 2 so. asto provide rollers or casters 14 at each corner of the frame of the show case.

In `the modified form`vof the inventior.

shown in Fig. 5' a series of leveis`ai'e used'` when it 1s necessaryto limit the extent of' the travel of the lever particularly 11i connecraise the inner end of the levers to project the casters or rollers to permit movement of the article of furnitureto which they are attached or to allow the Weight of this article to force the inner ends of the 'levers downward as the cams are retracted therefrom as shown by dotted lines in Fig. 3 so that the base of the article will rest upon the licor and cannot tlienbe easily moved or displaced. This construction is particularly adapted for furniture of considerable Weight as the use of independent'cams geared together provides a constructionvby'which the Weight can he more readily distributed with a minimum expenditure of power and an edal travelof each ofthe levers obtained,

thus lpreventing an unequal elevation of either end of the article to which they are .applied as would occur with* the use of opposite levers disposed above a single cam. The segmental gears upon the shafts of these camsfnot only effect an easy, continuous and equal travel of the levers, but also limit the extent of such travel in both directions by the solid portions carried upon thev gears. The invention thereforepresents a simple, efficient and economically constructed form of adjustable caster p'articularl adapted for use for show cases, shelving and other heavy articles of furniture which require considerable power in order to be raised above the floor upon which they rest. by the downward movement of the casters carried by the actuating levers therefor.

Having described 'my invention and set fort-h its merits, what I claim and desire to secure by Letters Patent is 1. A base frame, levers pivoted therein and provided at one end with casters, ind'.- pendent cams connected to operate oeneatn the opposite ends of said levers. and meshing,r gears upon the shafts of said cams to elfeet a simultaneous movement thereof.

2. A base frame, levers pivoted therein and provided at one end With Casters, independent cams connected to operate beneath the opposite ends of ysaid levers, and seb- 'mental gears meshing With each other and having a portion vto limit the tra-vel thereof.

3. In an adjustable caster, a frame, oppositely disposed levers pivoted therein, bearing'rollers provided at one end of said"levers, parallel shafts mounted in the frame and provided with independent cams'disposed tol engage one endof eaeh'of said levers, and means for simultaneously operati ing said camsi 4. In an adjustable caster, a frame', oppositely disposed levers pivoted therein, bear ing rollers provided at one end of said levers, parallel shaft-s mounted in the frame and provided with camsv disposed' beneath one end of Said levers, meshing `gears carried by the shafts of said cams, and an operating handle disposed upon the extended shaft of one of said gears. v

In testimony whereof I affix my signature in presence of two witnesses. l

JOHN M. WOOD litnesses ADAM M. Rien, HENRY SPELMAN. 

